Pipe-coupling.



PATENTED SEPT. 25, 1906.

T. O. WOOD.

PIPE COUPLING.

APPLICATION FILED SEPT. 15, 1905.

INVENTOR,

ESSES Qm/LMW(,M

UTED STATES PATENT OFFICE.

THOMAS C. IVOOD, OF BRIDGEIORT,

COMPANY, OF

CONNECTICUT, ASSIGNOR TO CRANE CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PIPE-COUPLING.

Patented Sept. 25, 1906.

Application filed September 15,1905. Serial No. 278.618-

depression through which the end of the pipe Be it known that I, THOMAS C. WOOD, a

8 projects, thesides of said depression and citizen of the United States, residing at pipe thus forming an annular groove or re- Bridgcport, 1n the State of Connecticut, have cess 10 for the reception of a packing 11,

invented certain new and useful Improvements in Pipe-Couplings, of which the following is a specification.

My invention relates to improvements in couplings for uniting pipes of different diameters, commonly known as reducing couplings and its princi al object is to provide an improved form of the device which does not necessitate the use of flanges of special design for the different sizes of pipes to be united.

A further object of my invention is to provide a pipe coupling of the class described, especially adapted to retain gases under high pressure or where subjected to extreme variations of temperature. These objects, and other advantages to hereinafter appear, attain by means of the construction illustrated in preferred form in the accompanying drawing, wherein Figure I is a longitudinal section of a pipe coupling and its component parts, illustrating my improvements applied thereto, and

Figure 2 is a sectional plan view on the line (2) of Figure 1.

In a pipe coupling of this class as heretofore constructed it has been found necessary to provide a special flange for the smaller similar to that in the groove 5. The flanges 3 and 7 are drawn together by means of longitudinal bolts 13.

"he packings 6 and 11 are forced into the grooves 5 and 10 in such manner as to form an absolutely tight joint around the pipes 4 and 8 respectively, when the flanges are locked together by means of an interposed sleeve or nipple 12, the ends of which correspond in size with the annular rooves into which they fit and abut against time packin s.

From the foregoing description it will e observed that in a coupling constructed in accordance with my invention it is not necessary to use a flange of sgecial size or design when uniting pipes of di erent diameters, as pipes of any size may be coupled together by the simple ex edient of tapping the bushing to fit the sma ler pipe and inserting a sleeve or nipple whose two ends are of a slightly greater diameter than that of the pipes to be connected. The recess in the flange 7 is not necessary, but it is convenient for accurately centering the bushings thereon.

Having thus described my invention and illustrated its use, what I claim as new, an desire to secure by Letters Patent, is the followin pipe, having bolt holes on the same centers 1. a pipe coupling the combination with as those in the larger pipe flange. In order to a large ipe and flan e head thereon and another lil e flange head, each of same having a recess in its face, of a similarly recessed smaller flange head fixed on a smaller pipe and seated in the recess of one of said large heads, a couplin sleeve having a small and a overcome this objectionablefeature and at the same time provide a coupling which will remain tight under high pressure or when subjected to extreme var1at1ons of temperature, a flange 3, is screw-threaded or secured in any other suitable manner to the end of the larger pipe 4, and is provided upon its inner face with an annular depression, through which the end of the pipe projects, the sides of said depression and pipe thus forming an annular groove or recess 5 for the reception of a packing 6.

A flange 7 corresponding in size and construction with the flange 3, surrounds the smaller pipe h, upon which is screw-threaded or secured in any other suitable manner a bushing 9, the outer end of which is formed to lit into the annular depression in the inner face of the flange. The inner face of the bushing 9 is also provided with an annular of the small and large flange heads, and means to compress said parts together.

2. The combination with a large and a' small pipe each having a flange head fixed thereon, of a sleeve having a large and a small end respectively abutting said flange heads and another similar large flange head having a recess engaging the smaller flange head behind, and means to clamp the parts together, substantially as described.

3. The combination with two like recessed large flanged heads and a pipe secured in one of them, of a small pipe aving a similar recessed flange head screwed thereon, the said large end, seate respectively in the recesses head resting in the 'recess of the free" large head, and a plain coupling sleeve having two ends of different diameter resting respectively in the recesses of the larg e and small flange heads, means to pack said ends, and

bolts to draw the large heads together and clamp the coupling sleeve between.

4. A pigie differen tion, two fl lar er pipe,

small pipe,

couphng for connecting pipes of ameters comprising, in combinaanges of a construction to fit the one of the same being secured to sai large pipe and: the other surrounding the a bushing Qseeured to said small with means ipe where it projects through the adjacent arge flange, and-a nipple interposed between said bushing and the opposite large flange for holding said parts together, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

1. o. WOOD. Witnesses F. J. ALLEN, C. G. HARRIS. 

